A battalion is a military unit, typically consisting of 300 to 1,200 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies. In some countries, battalions are exclusively infantry, while in others battalions are unit-level organizations.
Corps is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was first named as such in 1805. The size of a corps varies greatly, but from two to five divisions and anywhere from 40,000 to 80,000 are the numbers stated by the US Department of Defense.
The Canadian Army is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also responsible for the Army Reserve, the largest component of the Primary Reserve. The Army is headed by the concurrently held Commander of the Canadian Army and Chief of the Army Staff, who is subordinate to the Chief of the Defence Staff. The Army is also supported by 3,000 civilian employees from the civil service.
Garrison Petawawa is located in Petawawa, Ontario. It is operated as an army base by the Canadian Army.
The 1st Canadian Division is a joint operational command and control formation based at CFB Kingston, and falls under Canadian Joint Operations Command. It is a high-readiness unit, able to move on very short notice, and is staffed and equipped to meet Canada’s military objectives to counter any potential threat.
The Royal Canadian Regiment (RCR) is an infantry regiment of the Canadian Army. The regiment consists of four battalions, three in the Regular Force and one in the primary reserve. The RCR is ranked 1st in the order of precedence amongst Canadian Army infantry regiments, but in a quirk of the rules of seniority, its 4th battalion is 9th.
The Royal Hamilton Light Infantry (RHLI) is a Primary Reserve infantry regiment of the Canadian Army, based at John Weir Foote VC Armoury in Hamilton, Ontario. The RHLI is part of 31 Canadian Brigade Group, which is part of 4th Canadian Division.
The Lorne Scots is a Primary Reserve infantry regiment of the Canadian Army. It is part of the 4th Canadian Division's 32 Canadian Brigade Group.
The Brockville Rifles is a Primary Reserve infantry regiment of the Canadian Army. The unit is a part of the 33 Canadian Brigade Group, 4th Canadian Division. It is fifteenth in the order of precedence of Canadian Army Infantry Regiments.
The history of the Canadian Army, began when the title first came into official use in November 1940, during the Second World War, and is still used today. Although the official titles, Force Mobile Command, and later Land Force Command, were used from February 1968 to August 2011, "Canadian Army" continued to be unofficially used to refer to the ground forces of the Canadian Armed Forces, much as it has been from Confederation in 1867 to the present. The term was often even used in official military publications, for example in recruiting literature and the official newspaper of the Canadian Forces, The Maple Leaf. On August 16, 2011, the title, "Canadian Army", was officially restored, once again bringing the official designation in line with common and historical usage.
The Arizona Army National Guard is a component of the United States Army and the United States National Guard. National coordination of various state National Guard units are maintained through the National Guard Bureau.
A service battalion is a unit of the Canadian Armed Forces (CAF) that provides combat service support to a brigade group and its elements.
The 43rd Infantry Brigade was a brigade of the British Army during the First and Second World Wars, and later, as 43 (Wessex) Brigade, a regional headquarters from 1985 to 2014.
The Primary Reserve of the Canadian Armed Forces is the first and largest of the four sub-components of the Canadian Armed Forces reserves, followed by the Supplementary Reserve, the Cadet Organizations Administration and Training Service and the Canadian Rangers.
32 Canadian Brigade Group (32CBG) of the Canadian Army is part of the 4th Canadian Division. It is centred on the Greater Toronto Area, as well as Niagara Region and Brantford. It is headquartered at LCol George Taylor Denison III Armoury in Toronto, Ontario.
31 Canadian Brigade Group is part of the 4th Canadian Division, under the Canadian Army. It encompasses the southwestern portion of Ontario, and is headquartered in London, Ontario. The 31 CBG area of responsibility stretches from Hamilton to Windsor. The brigade has approximately 2,400 soldiers. Colonel Chris Brown, CD is Commander of 31 Canadian Brigade Group. The brigade sergeant-major is Chief Warrant Officer Mike Coit, CD.
3rd Battalion, The Royal Canadian Regiment (3 RCR) is a regular force light infantry battalion of the Canadian Forces. 3 RCR's most notable service occurred in Korea, Germany, Bosnia and Afghanistan. In 2006–2010, the battalion was deployed to Kandahar Province, Afghanistan. All three rifle companies were deployed at various times during this period of combat. Also notable was the period between 2003 and 2004, when it was the initial Canadian Forces unit to serve as part of the International Security Assistance Force, deploying to Kabul in August 2003.
The structure of the British Army of the United Kingdom (UK) is currently being reorganised to the Future Soldier structure. Due to these reforms taking place gradually, it is likely that some areas will not be fully complete. The British Army is commanded by the Chief of the General Staff (CGS), with Army Headquarters which is located in Andover, Hampshire. Subordinate to that post, there is a Commander Field Army, and a personnel and UK operations command, Home Command.
33 Service Battalion is a Canadian Forces Primary Reserve unit with three companies located in northern and eastern Ontario - at the M.L. Troy Armoury in North Bay, Pine Street Armoury in Sault Ste Marie, and the Major Holland Armoury in Ottawa. The battalion is under command of 33 Canadian Brigade Group, itself commanded by the 4th Canadian Division. The battalion is made up of officers and soldiers primarily from the Royal Canadian Logistics Service and the Royal Canadian Electrical and Mechanical Engineers providing Combat Service Support to 33 Canadian Brigade Group and other military organizations in eastern and northern Ontario - by means of transportation, supply, administration, food services, and mechanical repair and recovery activities.
The following is a hierarchical outline for the structure of the British Army in 1989. The most authoritative source for this type of information available is Ministry of Defence, Master Order of Battle, and United Kingdom Land Forces, HQ UKLF, UKLF ORBAT Review Action Plan, HQ UKLF, 1990.
Canada 
Primary Reserve 
